Species Differences in Thyroid, Kidney and Urinary Bladder Carcinogenesis

Book excerpt: In November 1997, an expert group was convened to discuss available knowledge on the epidemiology, pathology and mechanisms related to certain tumors that are commonly seen in essays for carcinogenicity in rodents in order that their importance in human hazard evaluation might be assessed. The tumors of interest were urinary bladder carcinomas associated with urolithiasis, microcrystalluria and certain urinary precipitates; renal corticol tumors in male rats associated with alpha-2 urinary globulin nephropathy; and thyroid follicular cell tumors associated with imbalances in thyroid stimulating hormone. Included in the book are a series of individually authored papers on these various topics, as well as a Concensus Report including consideration of how such data may be used within the evalation process in the IARC Monographs on the Evaluation of Carcinogenic risks to Humans.